The app root system property of log4j in the same Tomcat app cannot be the same and must be set differently. Otherwise, the following error occurs. The solution is identified in the error.

Severe: exception sending context initialized event to listener instance of class org. springframework. Web. util. log4jconfiglistener
Java. lang. illegalstateexception: web app root system property already set to different value: 'webapp. root '= [c: \ tools \ Tomcat \ apache-Tomcat-6.0.35 \ webapps \ dhoffice \] instead of [C: \ tools \ Tomcat \ apache-Tomcat-6.0.35 \ webapps \ sencloudmm \]-
Choose unique values for the 'webapprootkey' context-Param in your web. xml files!
At org. springframework. Web. util. webutils. setwebapprootsystemproperty (webutils. Java: 132)
At org. springframework. Web. util. log4jwebconfigurer. initlogging (log4jwebconfigurer. Java: 117)
At org. springframework. Web. util. log4jconfiglistener. contextinitialized (log4jconfiglistener. Java: 51)
At org. Apache. Catalina. Core. standardcontext. listenerstart (standardcontext. Java: 4206)
At org. Apache. Catalina. Core. standardcontext. Start (standardcontext. Java: 4705)
At org. Apache. Catalina. Core. containerbase. addchildinternal (containerbase. Java: 799)
At org. Apache. Catalina. Core. containerbase. addchild (containerbase. Java: 779)
At org. Apache. Catalina. Core. standardhost. addchild (standardhost. Java: 601)
At org. Apache. Catalina. startup. hostconfig. deploydirectory (hostconfig. Java: 1079)
At org. Apache. Catalina. startup. hostconfig. deploydirectories (hostconfig. Java: 1002)
At org. Apache. Catalina. startup. hostconfig. deployapps (hostconfig. Java: 506)
At org. Apache. Catalina. startup. hostconfig. Start (hostconfig. Java: 1317)
At org. Apache. Catalina. startup. hostconfig. lifecycleevent (hostconfig. Java: 324)
At org. Apache. Catalina. util. lifecyclesupport. firelifecycleevent (lifecyclesupport. Java: 142)
At org. Apache. Catalina. Core. containerbase. Start (containerbase. Java: 1065)
At org. Apache. Catalina. Core. standardhost. Start (standardhost. Java: 840)
At org. Apache. Catalina. Core. containerbase. Start (containerbase. Java: 1057)
At org. Apache. Catalina. Core. standardengine. Start (standardengine. Java: 463)
At org. Apache. Catalina. Core. standardservice. Start (standardservice. Java: 525)
At org. Apache. Catalina. Core. standardserver. Start (standardserver. Java: 754)
At org. Apache. Catalina. startup. Catalina. Start (Catalina. Java: 595)
At sun. Reflect. nativemethodaccessorimpl. invoke0 (native method)
At sun. Reflect. nativemethodaccessorimpl. Invoke (nativemethodaccessorimpl. Java: 39)
At sun. Reflect. delegatingmethodaccessorimpl. Invoke (delegatingmethodaccessorimpl. Java: 25)
At java. Lang. Reflect. method. Invoke (method. Java: 597)
At org. Apache. Catalina. startup. Bootstrap. Start (Bootstrap. Java: 289)
At org. Apache. Catalina. startup. Bootstrap. Main (Bootstrap. Java: 414)
2012-9-21 21:25:26 org. Apache. Catalina. Core. applicationcontext log
Information: initializing spring root webapplicationcontext
Log4j: warn no appenders cocould be found for logger (Org. springframework. Web. Context. contextloader ).
Log4j: Warn please initialize the log4j system properly.